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Network Engineer job description

A Network Engineer builds, secures, and optimizes enterprise network infrastructure. Learn what a Network Engineer does to maintain mission-critical uptime.

Published August 6, 2024Updated May 16, 20264681 likes

Job brief

We are looking for a skilled Network Engineer to lead the expansion and maintenance of our multi-site network infrastructure. You will be responsible for ensuring 99.99% uptime, securing our internal systems against evolving threats, and architecting scalable solutions to meet our growing data demands. If you are passionate about routing protocols, software-defined networking (SDN), and building resilient systems, we want you on our team. Join us to influence the future of our technical backbone while working with the latest enterprise-grade hardware.

Key highlights

  • Design and deploy scalable LAN/WAN architectures utilizing Cisco Catalyst and Nexus switches to support high-bandwidth traffic requirements.
  • Configure BGP, OSPF, and EIGRP routing protocols to optimize traffic paths and ensure seamless failover across distributed office locations.
  • Implement and harden perimeter security using next-generation firewalls like Palo Alto or Fortinet to mitigate unauthorized network access.
  • Automate routine network configuration changes and backups using Python scripts or Ansible playbooks to reduce manual overhead.

What is a Network Engineer?

A Network Engineer is a highly specialized IT professional responsible for designing, implementing, and managing the complex technology infrastructure that powers global communications. Network Engineers ensure high availability by architecting robust LAN/WAN environments, configuring advanced routing and switching protocols, and maintaining strict security standards through firewalls and VPNs. Their work is essential for organizational connectivity, as they define the underlying architecture that supports cloud integration, data transmission, and secure remote access for enterprise users.

What does a Network Engineer do?

On a daily basis, a Network Engineer troubleshoots complex connectivity issues, updates firmware on routers and switches, and monitors traffic flow using tools like Wireshark, SolarWinds, or PRTG. They collaborate with security teams to audit firewall rules and ensure compliance with protocols like ISO 27001 or NIST. Furthermore, a Network Engineer designs network topology diagrams, leads hardware upgrade projects, and fine-tunes load balancers to minimize latency and maximize application performance across the entire digital ecosystem.

Key responsibilities

  • Design and deploy scalable LAN/WAN architectures utilizing Cisco Catalyst and Nexus switches to support high-bandwidth traffic requirements.
  • Configure BGP, OSPF, and EIGRP routing protocols to optimize traffic paths and ensure seamless failover across distributed office locations.
  • Implement and harden perimeter security using next-generation firewalls like Palo Alto or Fortinet to mitigate unauthorized network access.
  • Execute regular network performance audits and capacity planning exercises to identify bottlenecks before they impact production environments.
  • Manage site-to-site VPN tunnels and client-to-site remote access solutions to provide secure connectivity for a distributed workforce.
  • Automate routine network configuration changes and backups using Python scripts or Ansible playbooks to reduce manual overhead.
  • Collaborate with cloud architects to integrate on-premises infrastructure with AWS Direct Connect or Azure ExpressRoute for hybrid environments.
  • Perform root cause analysis on high-severity network incidents and document resolutions within our enterprise ticketing and knowledge base systems.

Requirements and skills

  • 5+ years of hands-on experience in enterprise network engineering, specifically with Cisco IOS, XE, and NX-OS environments.
  • Deep technical proficiency in TCP/IP, DNS, DHCP, VLANs, and Subnetting alongside extensive experience with load balancing technologies.
  • Active CCNA, CCNP, or CCIE certification demonstrating mastery of complex routing, switching, and network troubleshooting techniques.
  • Working knowledge of Software-Defined Networking (SDN) and Network Function Virtualization (NFV) within modern data center environments.
  • Experience using network monitoring and packet analysis tools such as SolarWinds, Wireshark, NetFlow, and Splunk for traffic troubleshooting.
  • Bachelor’s degree in Computer Science, Telecommunications, or an equivalent combination of professional experience and technical training.
  • Ability to explain intricate technical architecture and hardware limitations to non-technical stakeholders and leadership teams during budget planning.
  • Demonstrated ability to manage long-term infrastructure projects while adhering to strict maintenance windows and change control procedures.

FAQs

What does a Network Engineer do on a daily basis?

A Network Engineer is responsible for the health and performance of the organization's data infrastructure. Daily tasks include monitoring network traffic for anomalies, resolving connectivity issues reported by users, and configuring hardware such as routers, switches, and firewalls. They also spend time planning for future capacity, performing firmware updates, and ensuring that security patches are applied to prevent vulnerabilities.

What skills are required for a Network Engineer?

Essential skills include a deep understanding of the OSI model, mastery of routing and switching protocols (like BGP and OSPF), and proficiency with enterprise hardware from vendors like Cisco, Juniper, or Arista. Additionally, modern Network Engineers need skills in network automation using Python or Ansible, experience with cloud networking (AWS VPC/Azure VNet), and strong analytical troubleshooting abilities to diagnose latency and packet loss.

How do I become a Network Engineer?

Most Network Engineers start by earning fundamental certifications such as the CCNA (Cisco Certified Network Associate), which covers the basics of networking theory and hands-on configuration. Pursuing a degree in Information Technology or Computer Science provides a strong foundation, though many enter the field through entry-level help desk or systems administration roles. Gaining experience with virtualization and infrastructure-as-code is increasingly important for career advancement.

Why is the role of a Network Engineer important to a business?

A Network Engineer is the gatekeeper of business continuity; if the network fails, operations come to a standstill. They are responsible for building resilient systems that prevent data breaches, reduce latency for critical applications, and ensure employees can communicate securely. By optimizing bandwidth and hardware efficiency, they directly influence the company's operational costs and its ability to scale infrastructure alongside business growth.